Improvement in vacuum-engines



2 Sheets-Sheet 1.

B. GOLDMANN. Vacuum Engine.

Patented Nov. 25, 1879.

FIG-1.

L MW

' INV'E MTo WITNESSES.

METERS, PH

B.. GO LDMA NN. Vacuum Engine.

2 SheetsShetQ.

Ive- 221,961. Patented Nov; 25, I879.

' TNESSE s N.FETERS, FHUTO-UTHOGRAPHER. WASHINGTON. D C.

I M ran STATES PATENT .CFFIGE.

I BENNO GOLDMANN, OF SAN FRANCISCO, CALIFORNIA, ASSIGNCR TO CHARLES\VACHER, HENRY SCHI INEMANN, AND HENRY LEWIS, ONE- FOURTH To EACH.

IMPROVEMENT lN VACUUM-ENGINES.

Specification forming part of'Letters PatentNo. 22 1,96 1 ,datedNovember 25,1879; application filed September 6, 1879.

To all whom it may concern:

Beitknown thatLBnNNo GOLDMANN, of the city and county of San Francisco,and State of California, have invented a Vacuum-Engine; and I herebydeclare the followingto be a full, clear, and exact description thereof.

. tons is open to the action of atmospheric pressure, and when thevacuum is formed beneath the piston it will be depressed.

Suitable operating-levers and connections serve to move the differentparts, as will be more fully described by reference to the accompanyingdrawings, in which Figure 1 is a view of my apparatus. Fig. 2 is asection taken through the line 1) 10. Fig. 3 is a section through theline my. Fig. 4 is a vertical section of one of the cylinders.

In the present case I have shown my apparatus as composed of twoworking-cylinders, AA, having tight-fittin gpistonsB, piston-rods C, andlinks or connections D, uniting them to the beam E, so that they willoperate alternately. I

F is a tank, reservoir, or generator, within which the gas or vapor tobe employed may be stored or produced. This generator is connected withthe cylinders by means of pipes G, and a valve, H, is operated by anoscillating frame, L, so asto directthe gas alternately into onecylinder and the other. I is a valve,

by which the whole supply may be cut off when desired; or a part may becut off, and the action thus regulated.

At the bottom of each cylinder is a valve, J, which rotates upon acentral pivot, and these valves are operated by connecting-rods K, whichextend to the frame L, before mentioned. A ring, M, surrounds eachcylinder at a point near the bottom of the stroke of the piston, andthis ring is perforated with openings N, which correspond with similaropenings in the side of the cylinder. These rings are also connected byrods 0 with the frame L, so. as to be operated simultaneously with theircorresponding valves J. These valves serve to admit air, which min gleswith the gas as it is introduced, and serves to assist its combustion orexplosion.

A shaft, I, extends across the supportingframe of the machine, and has acrank or eccentric, Q, to which an arm, R, from the beam connects, sothat the oscillation of the beam will communicate motion to the shaft P.

A crank, S, at the end of this .shaft has its crank-pinfitted to movewithin a wideslot or loop in the frame L, acting upon this frame like acam. i

The operation will then be as follows: The generator F may supplyhydrogen gas; or, if desired, ordinary coal or other gas or acombustible vapor may be employed. Just as the piston in one of thecylinders reaches its low est point the action of the crank S will havemoved the cam-frame L to one side, so as to strike the arm and open thevalve H to admit a charge of gas to the cylinder. At the same time thevalved at the bottom and the ringvalve M around the cylinder :are openedby .the action of the frame L, so as to admit a charge of air to mixwith the gas.

As the piston completes its ascent these valves are closed and thechargeignited by any-suitable means. When hydrogen is employed platinumsponge will serve to ignite it;

or the charge may be ignited by an electric spark, or otherwise. Thisproduces avacuun within the cylinder, and the pressure of air upon theexterior of the piston will force it down again. The operation of theopposite cylinder is similar, and the two will produce a continuousrotary motion of an axle or shaft by the intervention of any well-knownform of machinery for that purpose.

When a single cylinder is used, as for pump ing or other direct-actingwork, the operation 'will be the same; but some variation may be made inthe operating mechanism for moving the valves. This apparatus forms avery economical and efficient engine.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is

, 1. The cylinders A, pistons B, rods 0, links D, and the beam E, withits bifurcated arm R connected thereto, in combination with the shaft Pand crank Q, whereby the shaft is rotated, substantially as and for thepurpose herein described.

2. The cylinders A, with their pistons so connected as to drive theshaft P, in combination with the cam-frame L, connecting-rods K O, andthe valves J M, substantially as and for the purpose herein described.

3. The cylinders A, provided with the valves J and M, with theirconnecting-rods K and O, and the frame L, operated from the shaft 1?, asshown, in combination with the gas or vapor supplying tank F, with itspipes leading to the cylinders, and the valve H,'substantially as hereindescribed.

4. The apparatus consisting of the cylinders A, with their pistons B,and air-valves J and M, in combination with the gas-supply tank orreservoir F, with its valve H, and the camframe L, operated from themain shaft P, whereby combustible gas or vapor is supplied and ignited,so as to be burned beneath each piston alternately and a vacuumproduced, substantially as and for the purpose herein describe-d.

In witness whereof I have hereunto set my hand.

BENNO GOLDMANN.

WVitnesses:

S. H. NoURsE, FRANK A. BRooKs.

